Disclosing solution



Patented Mar. 21, 1939 2,151,495

UNITED STATES PATENT OFFICE DISCLOSING SOLUTION David V. Bender, Youngstown, Ohio No Drawing. Application April 5, 1937, Serial No. 135,076

'7 Claims. (01. 167-93) This invention relates to a disclosing solution of both of these dyes in the disclosing solution for application to the teethto render visible the gives a more pronounced color reaction with the mucin or bacterial plaques or deposits of other stains on the teeth than either one alone. Guinea feoreign material on the teeth which form stains Green B is one of the permitted coal tar food on the teeth. These plaques are not readily visdyes (United States Department of Agriculture, 5 ible and unless treated with a disclosing solu- Bulletin No. 1390, page 10, revised December tion, are likely to be overlooked when the teeth 1927) Rose Bengal is a harmless r a 00101 are cleaned. They lead to decay of the teeth (Leach-Winton, Food Inspection and Analysis, and should therefore be removed. 4th edition, page 815).

Disclosing solutions which have been used Guinea Green B, a triphenylmethane dye, is 10 heretofore contain iodin in an inorganic commade by condensing benzylethylanilinesulphonic pound as an essential ingredient. These inoracid with benzaldehyde, followed by oxidation of ganic iodin-containing disclosing solutions are the resultin Compound a d v r on i to he objectionable for several reasons, and because of m d u Salt- Ii? is dull dark-green powder their disadvantageous properties have not atbright Crystalline solid w c dissolves in 15 tained the wide use which it is desirable that diswater to form a green solution. Rose Bengal closing solutions should have in the cleaning of is o u p um a t o etraodo-diteeth. Iodin, as is well known, is poisonous and chlorofluorescein. It is a brownish or red powprecautions must therefore be taken not to leave dor Which s ad y s luble in Water, yielding a this type iodin-containing disclosing solutions in cherry-red color.

places where they are accessible to children. My The disclosing solution preferably contains an disclosing solution, on the contrary, is non-poiagent for increasing the viscosity, in addition to sonous. Iodin is irritating to the soft tissues of the organic dye or dyes and water. The preferred the mouth, and if used in excess, it will cause thickening agent is glycerine, although gelatiburning or blistering of these tissues. Some nous or other materials which have the property 25 people have iodin idiosyncrasies, that is, a susof thickening aqueous solutions may be employed. ceptibility to iodin, which renders its use on such It is desirable, although not absolutely necessary, persons inadvisable. It may actually cause a to employ a thickening agent in order that the P is n ng of such people. Cases are known where disclosing solution will have the proper viscosity a Person has been 50 Susceptible iodin D so as to remain on the teeth for a sufficient time 0 ing that it has been necessary for him to carry t rea t with th t i a card with him warning against the use of In addition to the ingredients specified, it is iodin in the event that he is i ju e In addialso desirable to employ a small amount of acetic tion, d s010s Solutions Containing iIlOTgailiG acid. The acetic acid appears to intensify the mp n f io in have a disagreeable taste color reaction with the stains on the teeth. A which prevents their being widely used. less satisfactory, though operative, disclosing These deleterious properties of iodin-containsolution may be made, however, without using ins d s n s l n ar bviated in the disacetic acid. The disclosing solution may also conclosing Soluti n of the present tion, which tain a small amount of flavoring material, for

contains a non-poisonous organic dye or mixture example, oil of peppermint. 40 of such dyes as the es e t ingredienily d My preferred disclosing solution contains the clo solution is preferably an aqueous Solution following ingredients in approximately the folcontaining Guinea Green B (CsvHseNzOsSzNa) lowing proportions by weight:

and Rose Bengal (C20H405C12I4Na2). although Parts 45 the Rose Bengal of this disclosing solution con- Rose Bengal 6 t ins some iodin, it constitutes only a small per- Guinea Green B 4, cent of the dye and is in a non-ionized form. Glycerine 15 Since the iodin is not in the ionized form and not Acetic acid 1 free, none of the above objectionable properties Water 600 50 of prior known disclosing solutions containing In using the disclosing Solution, it is applied to iodin and its comp u d in inorganic form the teeth with a small brush or a wad of cotton, noticeable in my disclosing solution. The solui u w d t remain on t t t for few tion may, however, contain only one of these dyes, onds, and the mouth is then rinsed out with water but it is preferred that it contain both. The use in order to remove the excess disclosing solution. 55

Those parts of the teeth which contain stains are reacted upon by the disclosing solution, rendering them clearly visible. The teeth are then cleaned in the ordinary manner in order to remove the stains. If, due to ineificient cleaning of the teeth, some of the stains are left on them, the color on the stains disappears within a few hours.

Although I have given a preferred example of my disclosing solution, it is to be understood that the invention is not limited thereto, but may be otherwise embodied or practiced within the scope of the following claims.

I claim:

1. A disclosing solution for application to the teeth, containing Guinea Green B.

2. A disclosing solution for application to the teeth, containing Rose Bengal.

3. A disclosingsolution for application to the teeth, containing Guinea Green B and Rose Bengal.

4. An aqueous disclosing solution for application to the teeth, containing Guinea Green B, Rose Bengal, and an agent for increasing the viscosity of the solution, the coloring ingredients being readily soluble in water and easily removed by water from an applicator used in applying the disclosing solution to the teeth.

5. An aqueous disclosing solution for application to the teeth, containing Guinea Green B, Rose Bengal, and glycerine, the coloring ingredients being readily soluble in water and easily removed by water from an applicator used in applying the disclosing solution to the teeth.

6. An aqueous disclosing solution for application to the teeth, containing Guinea Green B, Rose Bengal, glycerine and acetic acid, the coloring ingredients being readily soluble in water and easily removed by water from a applicator used in applying the disclosing solution to the teeth.

7. An aqueous disclosing solution for application to the teeth, containing the following ingredients in about the proportions specified by weight: Rose Bengal, 6 parts; Guinea Green B, 4 parts; glycerine, 15 parts; acetic acid, 1 part; water, 600 parts, the coloring ingredients being readily soluble in water and easily removed by water from an applicator used in applying the disclosing solution to the teeth.

DAVID V. BEN'DER. 

